Portable fan frame



FIG. 1 is a front left isometric view of a portable fan frame base section of my new design shown separately for clarity of illustration;

FIG. 2 is an enlarged front view (the back view is the same shape) thereof;

FIG. 3 is an enlarged right side view (the left side view is the same shape) thereof;

FIG. 4 is a greatly enlarged top view thereof;

FIG. 5 is an enlarged front left isometric view of a portable fan frame top section of my new design shown separately for clarity of illustration;

FIG. 6 is a front view (the back view is the same shape) thereof;

FIG. 7 is a greatly enlarged right side view (the left side view, top view and bottom view are the same shape) thereof;

FIG. 8 is a front left isometric view of a portable fan frame base and top section connected together of my new design;

FIG. 9 is an enlarged front view (the back view is the same shape) thereof;

FIG. 10 is a slightly enlarged right side view (the left side view is the same shape) thereof; and,

FIG. 11 is a greatly enlarged top view thereof. 

The ornamental design for a portable fan frame, as shown and described. 